Error Messages
I.2 Halt Code Messages
?06 HLT INST
PC = 800050D3
The number preceding the halt message is the "halt code." This number is
obtained from SAVPSL<13:8>(RESTART_CODE), IPR 43, which is saved on
any processor restart operation.
Table I–1
HALT Messages
Code
Message
Description
?02
EXT HLT
External halt, caused by either console BREAK condition,
Q22–bus BHALT_L, or DBR<AUX_HLT> bit was set while
enabled.
_03
—
Power-up, no halt message is displayed. However, the
presence of the firmware banner and diagnostic countdown
indicates this halt reason.
?04
ISP ERR
In attempting to push state onto the interrupt stack during
an interrupt or exception, the processor discovered that the
interrupt stack was mapped NO ACCESS or NOT VALID.
?05
DBL ERR
The processor attempted to report a machine check to the
operating system, and a second machine check occurred.
?06
HLT INST
The processor executed a HALT instruction in kernel mode.
?07
SCB ERR3
The SCB vector had bits <1:0> equal to 3.
?08
SCB ERR2
The SCB vector had bits <1:0> equal to 2.
?0A
CHM FR ISTK
A change mode instruction was executed when PSL<IS>
was set.
?0B
CHM TO ISTK
The SCB vector for a change mode had bit <0> set.
?0C
SCB RD ERR
A hard memory error occurred while the processor was
trying to read an exception or interrupt vector.
?10
MCHK AV
An access violation or an invalid translation occurred
during machine check exception processing.
?11
KSP AV
An access violation or translation not valid occurred during
processing of a kernel stack not valid exception.
?12
DBL ERR2
Double machine check error. A machine check occurred
while trying to service a machine check.
?13
DBL ERR3
Double machine check error. A machine check occurred
while trying to service a kernel stack not valid exception.
(continued on next page)
I–2 Error Messages
